Method for vulcanizing rubber tubes



J. G. MOOMY. METHOD FOR VULCANIZING RUBBER TUBES. APPLICATION FILED APR, 12. 1920.

Patented Jan. 17, 1922.

. the tube a OFFICE.

JOSEPH G; MOOMY, OF ERIE, PENNSYLVANIA.

METHOD FOR VULCANIZING RUBBER TUBES.

Specification of Letters Patent.

Patented Jan. 17, 1922.

Application filed April 12, 1920. Serial No. 373,080.

To all whom it may concern:

Be it known that I, JOSEPH G. MOOMY, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Methods for Vulcamzing Rubber Tubes, of which the following is a specification.

In forming rubber tubes particularly rub ber tubes which are utilized for inner tubes for pneumatic tires the rubber is usually rolled or formed on a pole. It is then wrapped with a cloth fabric usually wound over the rubber tube in the form of a spiral. This retains the tube in position during the vulcanization. The fabric so used lasts but a short time and is quite an item of expense. It also leaves the surface of the tube which has been Vulcanized in contact with the fab ric'rather rough and by reason of the spiral winding of the fabric gives to the walls of slight variation in thickness which tends to localize the weak parts of the wall so that the tube is thus somewhat impaired' With the present invention these difiieulties are obviated.

I form a tubular jacket of fabric and rubber, the fabric being formed in tubular shape with its threads running diagonally and the fabric is sufficiently filled with rubher to unite the portions of the fabric and ter of this invention and to form smooth walls jacket is of a size to wise over a tube on a jacket is then secured end of the tube and by expanding the jacket longitudinally the jacket is contracted transversely so as to bind the tube on the pole. The outer elm of the jacket is then secured and the tube vulcanized. After vulcanization the jacket is removed practically by a reverse of this process.

The apparatus forming the subject matwhich is designed to carry out the method is illustrated in the accompanying drawings as follows 4 Fig. 1 shows an elevation of a pole with the jacket arranged over the tube before the longitudinal expansion of the jacket, one end of the tube being secured. F Fig. 2 shows a section on line 22 in Fig. 3 a view similar to Fig. 1 but with for the jacket. This be readily'drawn endpole. One end of the the jacket longitudinally expanded and secured.

at or adjacent to one rubber tube in place thereon and the' Fig. 4 a section on the line 4-4in Fig. 3. Fig. 5 a view similar to Figs. 1 and 3 showing the method of removing the jacket. 1 marks a pole. These are of ordinary construction. The rubber tube 2 is shown as wound on the pole following the usual method. The jacket 3 is formed as heretofore suggested of a fabric with its threads diagonally arranged and a sufficient amount of rubber to secure the parts of the. fabric and to give a comparatively smooth wall to the jacket. One end of the jacket is secured by a tape 4 which is wrapped around the end of the jacket overlapping the end, a part extendlng on to the pole thus securing the jacket at this point.

shown in Fig. 1 the jacket is readily drawn over the tube 2. By expanding the acket longitudinally as indicated in Fig. 3 the diagonal arrangement of threads contracts the jacket drawing it down into contact with the tube 2 and exerting binding pressure on the tube The jacket is secured in its longitudinally expanded position by a tape 5 operating in the same manner as the tape 4. In this way the tube is secured perfectly. N o variations in the thickness of the wall are formed by reason of the spiral arrangement of fabric and the jacket if formed of a material designed to stand continual vulcanization will outlast the fabr10 sufficiently to make the processless ex pensive than where the ordinary fabric is use and 5 are removed. Air is introduced as from a nozzle 6 under the end of the jacket thus separating it from the rubber 2 and by grasping the jacket and crowding it endwise it is longitudinally contracted and consequently transversely expanded, thus permitting it to readily slip off the rubber tube.

at I claim as new is:

1. The method of j'acketing rubber tubes for vulcanizing the same which consists in enveloping the tube with a jacket and contricting the jacket transversely upon the tu e.

2. The method of jacketing rubber tubes for vulcanizing the same which consists in enveloping the tube with a jacket and contracting the jacket transversely upon the tube by extending the jacket longitudinally.

3. The method of jacketing'rubber tubes for vulcanizing the same whichjeonsists in enveloping the tube with a jacket having versely with a contraction of the jacket longitudinally,

5 The method of jacketing rubber tubes for vulcanizlng the same which consists in enveloping the tube Witha jacket; contracting the jacket transversely upon the tube by extending the jacket longitudinally; vulcanizing the tube so jacketed; and removing the jacket by expanding the same transversely with a contraction of the jacket. lon- 20 gitudinally While introducing air.

In testimony whereof have hereunto set my hand.

JOSEPH G. MOOMY. 

